Plow.



l No. 744,488. V11141111111111111017. 17, 1903.

J. CLAYTON.

PLOW.

- APPLIOATION FILED HAY 25. 1903.

5 No MODEL 2 SHEETS-HBM 1.

PATENTED Nov. 17, 1903.l

J. CLAYTON.

PLOW.

APPLICATION FILED MAY 25. 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

w e a M No. 744,4s`e;

Patented November 17, 190s.

UNITED 'STATES PATENT GEEICE.

JOHN CLAYTON, OE MINNEAPOLIS, MINNESOTA.

PLOw.

SPECIFICATION forming part of Letters Patent No. 744,488, dated November 17, 1903i Application filed May 25,1903. vSerialNo. 158,686. (No model.)

useful Invention in Plows; and I declare thel following tO be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters and gures of reference marked thereon, which form a part of this specification.

Figure 1 is a chart ot' the moldboard-blank with the edges thereof upsety or thickened for share and point. Fig. 2 is a chart of the moldboard-blank, showing curvatures. y Fig. 3 is a chartl of the full blank with increments for upsetting. Fig. 4 is a side elevation of the plow. Fig. 5 is a'reverse or inverted detail side view ofthe share from the land side. Fig.

6 is a detail plan view of thesame. Fig. 7 is a sect-ion 0n the line Fig. 4, on a somewhat smaller scale. Fig. 8 is a section on the line y y, Fig. 4, on a somewhat smaller scale.

The invention relates to plows, and particularly to the moldboard and share or furtern therefor the right-angle qtriangle 2 34l is formed in the front part, the base 2 3 be.- in g equal to the cut of the plow, usually about fourteen inches. The base constitutes the scale-line, it being divided into tenths and the tenth into eighths, sixteenths, and thirtyseconds. Set off the vertical line 2 4 of the triangle eight and one-half tenths of the base or cut to give the depth of the moldboard and the point 4. In this manner the line 3 4 is determined. Divide the line 2 4 into two equal parts at 5 and through the point 5,

which is about the centerrof the share, draw the line parallel to the base, such line termi nating in the points 6 7. Set o from 50u' this line six-tenths tothe point 8, through which produce a line from 3. Set off on the line 2 8 twenty-one tenths from the point 3, which will give the point 9.

from 9 to 4 draw the lines 2 9 and 9 4. The

From 2 to`9 and line 5 8, cutting the line 3 4, gives the point the concave join t-line h. It will be perceived that the joint-lineh and the curved line e meet a little beyond the point 3 and that the line h extends beyond the point 2 to meet the line g a short distance. A small depth extension of the moldboard-blank is thus provided in order to allow for the concave vertical curvature and the convex lateral oblique curvature of the moldboard, said curvatures giving the proper warped or double-curved friction-surface for the board. The outline ef g h indicates the shearing-line for cutting out the stock. The small amount five thirtyA seconds added on the depth is absorbed in forming the superficially-convex joint portion, and the extra length at the point 3 is provided to enable the workman to thicken up the plate at this point. This is only necessary to a small' extent, as the convex curvature of the friction-surface of the moldboard protects the shin from wear by lifting the earth in the center, and thus relieving the pressure on the shin.

The height of the moldboard at 9 is regulated by thepoint 8, the distance from 5 to S being made longer or shorter to depress or elevate the moldboard at this point, as may be required, Orthe length of the moldboard may be regulated vin accordancewith the distance set Oif on theline 3 8 9 tosnit different requirements.

The share b is made in a manner usual in the trade, but with a convex curvature at k to meet the curvature ofthe moldboard along the joint edge h.

Having described this invention, what I n claim, and desire to secure by Letters Patent, 1s-

1. The mold board ofgeneral diamond form, having its surface concave from base to top and convex from front; to rear, and provided with a convex forward edge and a convex top edge, substantially as specified.

2. Themoldboardofgeneraidiamondforxn, having its surface concave from base to top, and convex from front to rear, and provided with a convex forward edge, a convex top edge and a concave lower edge, substantially as specified.

3. The combination with the inoidboard of general diamond form having a convex forward edge, a convex top edge and the basejoint; edge snperfcially concave from base no JOHN CLAYTON.

Witnesses:

A. D. SMITH, S. A. RICE. 

